Posted once before but need suggestions

To this point, all of us that have of us that have posted have focused on bolt-on speed items. If you are willing and able to pull the engine and take it apart,, there are some real power gains to be had. A quick clean up of the head passages and combustion chambers can be done at home. The big gain comes from milling the head and/or block. Mopar recommends a maximum cut of .090" on either. Others here and on slantsix.org have reported going farther. though some have reported the need for shorter pushrods or shimming the rocker shaft. Assuming a compressed gasket thickness of .020, Mopar reports to 9.5:1 CR with a 1" deck height for the 225. This plays well with pump gas.